If you're on Android, grab "dvd" off F-Droid.

https://f-droid.org/en/packages/org.yausername.dvd/

Fairly user friendly, but also far more powerful than third party YouTube downloader services you can find online.

I don't personally use it, but there's also Videomass for Windows.

https://jeanslack.github.io/Videomass/

These tools give you relatively user-friendly access to yt-dlp.